DE68922471T2 - Method and device for determining a reference point on a gradation correction curve. - Google Patents

Method and device for determining a reference point on a gradation correction curve.

Info

Publication number
DE68922471T2
DE68922471T2 DE68922471T DE68922471T DE68922471T2 DE 68922471 T2 DE68922471 T2 DE 68922471T2 DE 68922471 T DE68922471 T DE 68922471T DE 68922471 T DE68922471 T DE 68922471T DE 68922471 T2 DE68922471 T2 DE 68922471T2
Authority
DE
Germany
Prior art keywords
determining
reference point
gradation correction
correction curve
curve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE68922471T
Other languages
German (de)
Other versions
DE68922471D1 (en
Inventor
Yasuharu Dainippon Sc Yonezawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Dainippon Screen Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dainippon Screen Manufacturing Co Ltd filed Critical Dainippon Screen Manufacturing Co Ltd
Application granted granted Critical
Publication of DE68922471D1 publication Critical patent/DE68922471D1/en
Publication of DE68922471T2 publication Critical patent/DE68922471T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G06T5/92—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/40—Image enhancement or restoration by the use of histogram techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original
    • H04N1/4074—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original using histograms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6027—Correction or control of colour gradation or colour contrast
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Color Electrophotography (AREA)
DE68922471T 1988-12-09 1989-11-30 Method and device for determining a reference point on a gradation correction curve. Expired - Fee Related DE68922471T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63312684A JPH0683373B2 (en) 1988-12-09 1988-12-09 How to set the reference concentration point

Publications (2)

Publication Number Publication Date
DE68922471D1 DE68922471D1 (en) 1995-06-08
DE68922471T2 true DE68922471T2 (en) 1995-09-07

Family

ID=18032180

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68922471T Expired - Fee Related DE68922471T2 (en) 1988-12-09 1989-11-30 Method and device for determining a reference point on a gradation correction curve.

Country Status (4)

Country Link
US (1) US4984071A (en)
EP (1) EP0372390B1 (en)
JP (1) JPH0683373B2 (en)
DE (1) DE68922471T2 (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2887158B2 (en) * 1989-06-14 1999-04-26 富士ゼロックス株式会社 Image processing device
US5117293A (en) * 1989-11-28 1992-05-26 Dainippon Screen Mfg. Co. Ltd. Method of and apparatus for generating conversion curve employable for converting reproduction characteristic of image
US5177602A (en) * 1989-12-28 1993-01-05 Konica Corporation Image scanners
JPH04246690A (en) * 1990-08-29 1992-09-02 Xerox Corp Method of displaying image having high quality by normal resolution
US5265200A (en) * 1990-11-01 1993-11-23 International Business Machines Corporation System and method for automatic image saturation, gamma, and exposure correction in a digitizing video capture system
US6546131B1 (en) * 1990-12-19 2003-04-08 Canon Kabushiki Kaisha Image processing method and apparatus for achieving tone reproduction suited to the image
EP0528618B1 (en) * 1991-08-21 1996-11-06 Konica Corporation Image forming apparatus
DE69216190T2 (en) * 1991-09-27 1997-04-17 Dainippon Screen Mfg Method and device for converting image signals representing an image with gradation
US5333065A (en) * 1991-12-09 1994-07-26 Agfa-Gevaert Signal to density mapping with controlled contrast
DE4309877C2 (en) * 1992-04-06 1994-09-15 Hell Ag Linotype Method and device for analyzing color casts in color templates
DE4310727C2 (en) * 1992-04-06 1996-07-11 Hell Ag Linotype Method and device for analyzing image templates
US5410418A (en) * 1992-06-24 1995-04-25 Dainippon Screen Mfg. Co., Ltd. Apparatus for converting image signal representing image having gradation
JP2741996B2 (en) * 1992-10-30 1998-04-22 大日本スクリーン製造株式会社 How to create a normalized curve
US5426517A (en) * 1992-11-30 1995-06-20 Eastman Kodak Company Automated tone correction apparatus and method using filtered histogram equalization
EP0603908A3 (en) * 1992-12-25 1996-02-07 Dainippon Screen Mfg Method of and apparatus for converting image signals.
US6278800B1 (en) 1993-11-04 2001-08-21 Eastman Kodak Company Method and associated apparatus for transforming of color-image signals for consistent shadow to highlight characteristics
US5608548A (en) * 1994-12-23 1997-03-04 Hewlett-Packard Company Automatic color adjustment in a document processing environment
US5741341A (en) * 1995-08-14 1998-04-21 Emerson Electric Co. Portable/mountable air cleaner
JPH09294215A (en) * 1996-02-29 1997-11-11 Konica Corp Color condition calculation method, color correction method, color correction condition calculation method, color correction device and storage medium
US6061091A (en) * 1996-05-30 2000-05-09 Agfa Gevaert N.V. Detection of and correction for specular reflections in digital image acquisition
EP1383100A3 (en) * 1996-08-28 2005-02-02 Matsushita Electric Industrial Co., Ltd. Local positioning apparatus and method therefor
US6181321B1 (en) 1997-04-23 2001-01-30 Canon Kabushiki Kaisha Combined color cast removal and contrast enhancement for digital color images
US6204940B1 (en) * 1998-05-15 2001-03-20 Hewlett-Packard Company Digital processing of scanned negative films
US6628830B1 (en) 1998-06-24 2003-09-30 Canon Kabushiki Kaisha Image processing method and apparatus and storage medium
JP4194133B2 (en) 1998-06-24 2008-12-10 キヤノン株式会社 Image processing method and apparatus, and storage medium
US6694051B1 (en) * 1998-06-24 2004-02-17 Canon Kabushiki Kaisha Image processing method, image processing apparatus and recording medium
US6681042B1 (en) 2000-08-29 2004-01-20 Eastman Kodak Company Digital color image processing method
US6771311B1 (en) 2000-12-11 2004-08-03 Eastman Kodak Company Automatic color saturation enhancement
US7057768B2 (en) * 2001-07-02 2006-06-06 Corel Corporation Automatic color balance
US7009733B2 (en) * 2001-07-02 2006-03-07 Coral Corporation Manual correction of an image color
GB0120489D0 (en) * 2001-08-23 2001-10-17 Eastman Kodak Co Tone scale adjustment of digital images
EP1292113A3 (en) * 2001-08-23 2005-03-23 Eastman Kodak Company Tone scale adjustment
US7085008B2 (en) * 2002-03-20 2006-08-01 Eastman Kodak Company Digital color image processing method for improved tone scale reproduction
US7085007B2 (en) * 2002-03-20 2006-08-01 Eastman Kodak Company Digital color image processing method
WO2004023787A2 (en) * 2002-09-06 2004-03-18 Rytec Corporation Signal intensity range transformation apparatus and method
US7130485B2 (en) * 2002-10-02 2006-10-31 Eastman Kodak Company Enhancing the tonal and color characteristics of digital images using expansive and compressive tone scale functions
US8023733B2 (en) 2006-06-08 2011-09-20 Panasonic Corporation Image processing device, image processing method, image processing program, and integrated circuit
JP4575963B2 (en) * 2008-02-14 2010-11-04 三菱電機株式会社 Image processing device
JP6241192B2 (en) * 2013-10-18 2017-12-06 株式会社リコー Image processing apparatus, image processing system, image processing method, program, and recording medium
US10217242B1 (en) * 2015-05-28 2019-02-26 Certainteed Corporation System for visualization of a building material
US11195324B1 (en) 2018-08-14 2021-12-07 Certainteed Llc Systems and methods for visualization of building structures

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4667228A (en) * 1983-10-14 1987-05-19 Canon Kabushiki Kaisha Image signal processing apparatus
DE3751412T2 (en) * 1986-09-02 1995-12-14 Fuji Photo Film Co Ltd Method and device for image processing with gradation correction of the image signal.

Also Published As

Publication number Publication date
DE68922471D1 (en) 1995-06-08
EP0372390A2 (en) 1990-06-13
JPH0683373B2 (en) 1994-10-19
EP0372390B1 (en) 1995-05-03
JPH02157758A (en) 1990-06-18
EP0372390A3 (en) 1992-04-01
US4984071A (en) 1991-01-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee